LITHIUM SECONDARY BATTERY HAVING HIGH CAPACITY

摘要

PURPOSE: A lithium secondary battery is provided to obtain high energy density by comprising a negative electrode and positive electrode with high capacity and to improve stability by preventing the generation of dendrite lithium on the surface of the negative electrode. CONSTITUTION: A lithium secondary battery comprises a negative electrode of high capacity and a positive electrode of high capacity which comprises Li2O or Li2O2 as active materials. The negative electrode comprises one material selected from silicon-based materials, tin-based materials and lithium-based metals as an active material. The silicon-based material is selected from silicon, silicon oxides and silicon alloys. The tin-based material is selected from tin, tin oxides and tin alloys. The positive electrode is formed of pours materials. [Reference numerals] (1,BB) Charging; (2,CC) Discharging; (AA) High capacity cathode; (DD) Porous anode containing Li_2O_2